List of characters by birthday

January

• Yuki
• Meijiu Lee
• Headmaster
• Marie Moriya
• Gertrude
• Cornelia

February

• Dlanor A. Knox

March

• Maria Ushiromiya

April

• Juuza Amakusa
• Keiichi Maebara

May

• Teppei Houjou
• Shannon

June

• Asmodeus
• Stella Maiougi
• Meryl Tanashi
• Satoshi Houjou
• Miyo Takano
• Satoko Houjou
• Satan
• Mammon
• Lucifer
• Leviathan
• Belphegor
• Beelzebub
• Hameln

July

• Tohya Hachijo
• Philip Butler
• Rena Ryuuguu
• Battler Ushiromiya

August

• Yoshihito Kanamori
• Kinzo Ushiromiya
• Jessica Ushiromiya

September

• Beatrice Castiglioni
• Jirou Tomitake

October

• Kanon
• Erika Furudo

November

• Rudolf Ushiromiya
• Black Tea Gentleman
• Kyrie Ushiromiya
• Chiester 410

December

• Holly Sana